Image rectification using sparsely-distributed local features
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United States of America Patent
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Apr 14, 2015
Grant Date -
May 22, 2014
app pub date -
Nov 20, 2012
filing date -
Nov 20, 2012
priority date (Note) -
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Abstract
This invention is a method for rectifying an input digital image including warped textual information. The method includes analyzing the input digital image to locate a plurality of local features, at least some of the local features including textual features. A sparse set of local image regions are located corresponding to reliable combinations of spatially-consecutive local features, and corresponding local orientations are determined. A global deformation function is formed by interpolating between the determined local orientations and is used to form a rectified image.
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